Notes:

[1860, to Taftah:] My heart very much wants to see you. And seeing
you is dependent on your coming here. If only you had come with your venerable
father, and had seen me before you left! I've brought the Urdu divan
from Rampur, and it has gone to Agra; there it will be printed. One copy will
be sent to you too: {124,1}. (Arshi 247)

'It's your doing, it's up to you' [literally, 'You would
know, your work would know': tum jaano tumhaaraa kaam jaane]--
we have no entree into it. But while meeting the Other, why do you renounce
meeting me? (133)

Now the beloved absolutely won't listen to a thing he says.
Desperate, he says, you're in control of your own behavior, we don't say anything
to you about the Rival.
But why have you abandoned us? From 'Would it be a sin?' comes the aroma of
complaint. (250)

FWP:

Nazm points to the idiom 'X jaane Y
jaane ' (literally, 'X would know, Y would know') that
is used to mean 'it's nobody's concern but X's and Y's'. In the verse, the
idiom is truncated so that it's nobody's concern but the beloved's (and the
Other doesn't seem to come into it at all), which is amusingly appropriate
to the situation. The implication is that the beloved is significantly involved
with the Other, and the speaker is bending over backwards to disavow all right
to inquire about this involvement.

The speaker uses this disavowal as leverage to imply that
the beloved ought also to show some concern for him (as a former lover? as
a fellow-lover and peer of the Other?). This is not a major request-- the
beloved ought to show concern only to the very mild extent of kisii
ko puuchhnaa , 'to inquire about someone['s wellbeing]'. To 'keep on'
doing this would mean nothing more than occasionally making a friendly (but
perhaps formal and perfunctory) inquiry about someone's health, as one might
dutifully inquire about the condition of a sick acquaintance. The use of 'keep on'
also suggests that perhaps this is all the interest the beloved has ever shown,
and the lover is concerned about losing even this.

Then there's the idiomatic kyaa gunaah ho
-- 'would it be a sin?' or 'what [kind of] sin would it be?'-- that conveys
more than a touch of sarcasm. Far from being a sin or wrong, the speaker implies,
it would be only right and proper for the beloved to maintain at least a show
of concern.

The result is a verse that is completely in the future subjunctive--
a verse that does its work through implication and insinuation. This makes
the wordplay of 'to know' [jaan'naa] and 'to inquire'
[puuchhnaa] all the more piquant.

Compare {71,9}, which also
uses kisii ko puuchhnaa , and also combines it with
sarcastic hyperbole ('it wouldn't do any harm').